Riveting machine



INVENTOR. ia oduv/ Bnmvor fiTrggNEYs.

' March 31, 1931. R. BRANDT I RIVETING MACHINE Filed April 22, 1924Patented Mar. 31, 1931 UNITED PATENT omcr.

RUDOLPH BRANDT, OF SAN FRANCISCO, eALIroRNIA, AssIeNon TO PETRY &BRANDT, or SAN FRANCISGO, CALIFORNIA, A GOPARTNERSHIP R'IvErINGApplication md A ril as The present invention relates toimproveinent'sin riveting machines and has pa'rticular reference to ariveting machine designed for use in connection with the riveting ofbrake bands. It is the particular object of the inv'entio'n to provide ariveting machine by means of which a large plurality of rivets in acircular brake band for seciir'ing the lining thereto cah be rapidlymanipulated, the

con'stf'i1ct'ion such that the circular band can be convenientlyintroduced between two operative elements in reversed "po'sitit'insaccording to Whether the lining is on the inside or on the outside ofthe brake band.

It is further proposed to provide means in connection with the machinewhereby the surrounding area of the lining is first pressed into fiflncontact with the brake band material before the squashing action iscommenced. 7

It is further proposed to provide convenient meansin connection with themachine for cutting off the heads of, old rivets in a useclbrake band.It is further proposed to provide convenient means allowing for therapid removal of the old rivets after the heads have been cut off.Further obj'eets and advantages of my device will appear as thespecification proceeds.

V The preferred form of the invention is illnstrated in the accompanyingdrawing, in which Figure 1 shows side elevation of my machine, Figures 2and 3 side views taken at right angles to one another of a rivet headciitting element, Figure as side View of a punch for the removal of theri've'ts, 5 a side vi'evs of an abiitting element bearing on the end ofthe "rivet diiringthe squashing action, and Figure 6 an en-' larged,detail section taken along line VI =VI of Figure 1. While I have shown6111 the preferred form of the invention, I tier to have it iinderstobdthat various chan es or modifications may be made within the scope ofthe claims hereto attached Without departing from the spirit 6f theinvention.

My riveting machine comprises a casting (2) censi'sting 6f a'pl'ate (8)adapted MACHiNE 1827. Serial No. 186,100.

to be secured to a support (4) by means of bolts ('6) and a supportingelement (7 extending perpendicularly from the plate (3) and providedwith a vertical perforation (8) near the plate allowing a vertical shaft(9) to be firmly held therein by means of bolts (11) and a secondperforation in the distant end of the supporting element runningparallel to the perforation (8) allowing the holding member (13) to bereceived therein.

The latter holding member consists of a shaft provided with a plnralityof recesses (It) in the circumference thereof adapted to receive the endof a pin (16) slidable transversely to the shaft in a lateralcmloossin'ent (17 and forced into one of the recesses (14) by means of aspring (18) con fined betvveen'a collar (19) on the pin and a cap (21)covering a recess ('22) in the embossment, and held in place by means ofbolts (23). A head (24;) allows of the easy manipulation of the pin(16).

The shaft (13) is made hollow in the bottom end thereof as shown at andis adapted toreceive any one of a plurality of ab'utni ents illustratedin the Figlires 2 to 5, all of which are formed ivith pins adapted to beintroduced into the shaft (13) and pi'ovided With recesses in thecircinnference thereof which may be engaged by the setting: member (27)monnljed radially in the hollow shaft and forced into the recesses bymeans of an annular spring- (28) secured to the outside of the shaft asshown at ('29), While a head ('31) allows of the easy withdraival of thesetting member from its ongagement. V

The shaft which cktends downwardly from the member has a castingslirlable thereon with a spring (33) tending: to force the casting (32)away from the upper structure. VThe latter casting presents aperforation (34) in al'inement with the perforation (12) in the u'ppercasting adapted to receive the sleeve (36) which latter is formed with ahead (37) resting on the edge of the perforation (34). The upper face ofthis sleeve is curved to conform to the outlines of the circular brakeband so that the latter may he placed on the same for the purpose ofpunching old rivets out of the band.

.A pin formed with a shoulder (39) may he introduced into the sleeve sothat the shoulder rests on the edge thereof with a projection (41)extending upwardly from the pin for engagement with the head of therivet to be operated on.

Of the abutments previously referred to, that shown in Figures 2 and 3constitutes a means for cutting off the heads of old rivets. Itcomprises the pin (26) previously referred to and a blade (42) extendingfrom the end thereof and forming a shoulder (43) with the same. Theblade is tapered toward its extremc end to provide a cutting edge (44)which latter is preferably made concave as shown at (46) to insure abetter engagement with the rivet to be cut. The pin (26) of thisabutment is formed with two oppositely arranged recesses (47) forengagement with the setting member (27) which causes the blade to beheld in one of two operative positions for cutting the rivet head.

The abutment shown in Figure 4 has a conical element (48) extendingtherefrom terminating in a cylindrical member (49) forming a punch forthe removal of old rivets.

The abutment shown in Figure 5 comprises a cylindrical element extendingfrom the pin (26) having a sleeve (52) slidable thereon guided by asmall pin (53) sliding in a slot (54) in the sleeve and normally heldslightly in advance of the member (51) by means of a spring (56). Bothabutments shown in Figures 4 and 5 are formed with annular grooves (57)for engagement with the setting member (27).

The casting (32) is actuated by means'of a lever arrangement including alever (61) pivoted to the lower end of the shaft (9) as shown at (62)and operativcly connected with the casting by means of the short link(63) pivotally connecting the short arm (64) of the lever with thecasting. The long arm (66) of the lever is pivotally connected by meansof a link with the fulcrum (67) of a foot operated lever (68) pivoted inthe standards (69).

The device is preferably used as follows:

Assuming that the lining on a brake band has to be renewed, the firststep is the removal of the old rivets. For this purpose the abutmentshown in Figures 2 and 3 is introduced into the shaft (13) and securedby the setting member (27) in the manner described. The brake bandhaving the old lining thereon is then placed on edge on the projection(41) for engagement of the cutting edge (46) with that portion of theshank of the rivet next to the head, whereupon the lever (68) isdepressed by the foot of the operator, causing the head to be snappedoff by the advance of the casting (32).

After all the heads have been cut oil, the

device is set for the punching operation by introducing the abutmentshown in Figure 4 into the shaft (13) and by removing the pin (38) fromthe sleeve (36). By centering each rivet with the perforation in thesleeve (37) and depressing the lever (68) the rivets are punched out ofthe brake band in rapid succession.

The old lining may now be removed and the new lining put in place. Themachine is re-set by the introduction of the abutment shown in Figure 5into the shaft (13) and by the introduction of the pin (38) in thesliding casting The rivet is manually inserted in two reg istering holesin the brake band and in the lining, which latter has been previouslyprepared for this purpose, whereupon the head of the rivet is placed onthe projection (41) with the point of the rivet extending toward thestationary abutment. A pressure on the lever (68) advances the rivetendwise toward the abutment for squashing action. But before thesquashing action sets in, the sleeve (52) engages with that portion ofthe brake band surrounding the rivet and firmly presses the brake bandagainst the lining so as to insure a firm union between the brake bandand the lining.

As the advance of the casting (32) is continued, the sleeve (52) isforced upwardly against the spring (56) and the end of the rivet engageswith the abutment for the formation of a second head on the rivet.

I claim:

1. A device of the type described comprising a reciprocal member, anabutment carried by said member and having a pin for entering thecounter-sink portion of a brake band and for bearing 011 the head of arivet and having a shoulder bearing on the margin of the counter-sink,and a second shoulder for bearing against the surface of the brake band,a second abutment, means for supporting said second abutment inalignment with the first abutment, said second abutment having a shankfor squashing one end of a rivet, a sleeve slidably mounted on saidshank, means for limiting the movement of said sleeve with respect tosaid shank, and spring means for yieldingly holding said sleeve in oneposition, said sleeve being adapted to initially enclose the rivet andbear against the brake band for holding the brake lining in contact withthe metal band prior to the squashing action.

2. In a device of the type described, two members, one movable towardand away from the other, and being spaced far enough apart for receivinga brake band disposed on its edge, a manually actuated leveragemechanism with a fixed throw operatively connected to the movablemember, a cylindrical shear die positioned in a bore in said movablemember, a punch positioned in a bore in said

